About the cover: Camera trapping has become an important tool for ecological study, especially when working with elusive species in remote areas. This issue’s cover image shows a series of photos of snow leopards collected by the authors with camera traps in the mountains of northern Pakistan in 2011 and 2012. Each row of images is a separate sequence, captured at a different site. The data from camera trapping – evidence of an organism in space and time – are a result of the ecological process of presence vs. absence and the observation process of detection vs. non-detection. The article associated with the image, Using time-to-event analysis to complement hierarchical methods when assessing determinants of photographic detectability during camera trapping, demonstrates how hierarchical analytical methods, in combination with time-to-event statistics, can yield valuable insights into how photographic evidence accumulates during camera trapping. The Norwegian University of Life Sciences published a press release about this article, entitled ‘Spying on snow leopards’.

To keep up to date with Methods newest content, have a look at our Accepted Articles and Early View articles, which will be included in forthcoming issues.